Migration Guides
Phaseo migration guides cover two different upgrade problems:- moving from one platform or gateway to Phaseo
- adopting a specific model release on the same platform
Model migrations
Upgrade a model while keeping the surrounding integration broadly the same.
Platform migrations
Move an SDK, provider, or gateway integration onto Phaseo.
Model migrations
Use model migrations when the integration stays broadly the same but the model changes underneath it. These guides focus on:- request parameter changes
- prompt and reasoning behavior shifts
- structured output and tool-calling differences
- rollout, fallback, and rollback strategy
- Anthropic Claude Opus 5
- OpenAI GPT-5.6
- Anthropic Claude Opus 4.8
- Anthropic Claude Opus 4.7
- Mistral Small 4
- OpenAI GPT-5.4
- Google Nano Banana 2
- Google Gemini 3.1
- Anthropic Claude Sonnet 4.6
- SpaceXAI Grok 4.20
- Anthropic Claude Opus 4.6
Platform migrations
Use platform migrations when you are changing SDKs, providers, or gateways and need to map your current integration onto Phaseo.Build a migration checklist
Choose your current integration and open the interactive migration assistant.
- OpenAI SDK Migration
- Anthropic SDK Migration
- OpenRouter Migration — switch the endpoint and key, verify model IDs, and test streaming and rollback.
- Vercel AI Gateway Migration
- LLMGateway Migration
- LiteLLM Migration
- Cloudflare AI Gateway Migration
- Helicone AI Gateway Migration
How to use these guides
- Identify whether you are changing the platform, the model, or both.
- Start with the guide that matches the riskiest part of the migration.
- Verify request parameters and endpoint behavior before comparing output quality.
- Run production-like evals before shifting live traffic.